For the latest installed DevTest version 10 , we are facing some registry issues where the registry disconnects at least twice in a day. Seeing OOM errors in the logs.
· Initially, components are started with default memory allocation and noticed an issue that Outofmemory error in registry log.
· So, we allocated 1.5GB for Registry, Coordinator, Simulator and restarted components.
· Still we see error in registry logs as below. During this issue, CPU was spiking and system CPU went to 90% and registry is not responded.
ERROR messages in the Registry logs with warning as GC Thrashing
2017-03-24 06:15:39,912Z (02:15) [ServerRequestHandler-1] ERROR com.itko.lisa.net.ServerRequestHandler - Could not fetch a message from QUEUE: GC overhead limit exceeded
java.lang.OutOfMemoryError: GC overhead limit exceeded
Reason for OOM -
The <user-search-filter> in the authentication-provider.xml file seems overly broad, "<user-search-filter>(objectClass=*)</user-search-filter>”. Depending on how many users you have, this could lead to an Out Of Memory Exception for too may LDAP entries
You should refine your search to something like
"<user-search-filter>(&(objectClass=user)(sAMAccountName={0}))</user-search-filter>”.
or something like this...
<user-search-filter>(&(objectClass=person)(cn={0}))</user-search-filter>
Your ldap admin should be able to give you a better filter.
DEVTEST 10.0
Customer updated the search filter in the authentication-providers.xml file for LDAP users
“<user-search-filter>(&(objectClass=user)(sAMAccountName={0}))</user-search-filter>”
This resolved the issue.